Read e-book online An Introduction to Bioreactor Hydrodynamics and Gas-Liquid PDF

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By Enes Kadic

ISBN-10: 1118104013

ISBN-13: 9781118104019

Reviews and compares the foremost different types of bioreactors, defines their professionals and cons, and identifies study wishes and figures of advantage that experience but to be addressed

  • Describes universal modes of operation in bioreactors
  • Covers the 3 universal bioreactor forms, together with stirred-tank bioreactors, bubble column bioreactors, and airlift bioreactors
  • Details much less universal bioreactors kinds, together with mounted mattress bioreactors and novel bioreactor designs
  • Discusses merits and drawbacks of every bioreactor and gives a approach for optimum bioreactor choice in accordance with present approach needs
  • Reviews the issues of bioreactor choice globally whereas contemplating all bioreactor thoughts instead of targeting one particular bioreactor type

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Additional info for An Introduction to Bioreactor Hydrodynamics and Gas-Liquid Mass Transfer

Example text

Hence, using Eq. 12), more accurate gas holdup measurements in cocurrent multiphase systems can be made with only pressure measurements, and the calculation is as simple as that required by Eq. 11). Furthermore, no knowledge of wall shear stress is required for Eq. 12), which is not the case for Eq. 10). Tang and Heindel (2006a) have shown that gas holdup in a cocurrent air–water–fiber bubble column was simple and accurate with Eq. 12), while error could be significant for selected operational conditions with Eq.

2001) stated that the Winkler method is the most accurate and precise of all methods for determining dissolved oxygen concentrations, and that it is also the most challenging technique to master and the most time consuming. , 1992), but are not frequently used. 2 Volumetric Method. The volumetric method is simple and robust in principle, but rather inaccurate in practice. This method relies on the conversion of dissolved oxygen to carbon dioxide which is then driven out of solution. As the carbon dioxide is driven out of solution, it is collected and its volume is determined at a known pressure and temperature.

The ungassed power number (Npo ) represents the ratio of the pressure differences producing flow to the inertial forces of the liquid dispersion and it is analogous to a friction factor or drag coefficient. 13) where Po is the impeller power input into the liquid without sparged gas, ???? is the fluid density, N is the impeller speed, and Di is the impeller diameter. The gassed power number Npg is a dimensionless parameter that provides a measure of the power requirements for the impeller operation in a gas–liquid dispersion.

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An Introduction to Bioreactor Hydrodynamics and Gas-Liquid Mass Transfer by Enes Kadic

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